Herb Pharm prepares their Hawthorn Blend extract from spring-harvested flowers & leaves and autumn-harvested berries of Crataegus spp. trees which are Certified Organically Grown without the use of chemical fertilizers, pesticides or herbicides or Custom Wildcrafted in their natural wild habitat. They are carefully shade dried and then thoroughly extracted. By blending the leaves, flowers & berries, they produce an extract that is optimally concentrated in hawthorn's bioactive compounds. Herb Pharm Hawthorn is never fumigated or irradiated.